[Ohrrpgce] SVN: teeemcee/11199 thingbrowser and spriteset browser now mark all their planks as clipping

[subversion at HamsterRepublic.com]

teeemcee
2019-08-03 23:42:28 -0700 (Sat, 03 Aug 2019)
291
thingbrowser and spriteset browser now mark all their planks as clipping, for a speedup

This is a major speedup when there are thousands of records/spritesets, most of
which are offscreen and now no longer drawn. Now all browsers should run at full
framerate (err... 18fps) on any computer.
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U   wip/data/spriteset_browser.slice
U   wip/drawing.bas
U   wip/thingbrowser.bas